Home / 2,700.11-3,721.90-1,989.69

Finding the Fourth Proportional to 2,700.11, 3,721.90 and 1,989.69

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Solution

The fourth proportional to 2,700.11, 3,721.90 and 1,989.69 is: 2,742.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,700.11 : 3,721.90 = 1,989.69 : x
  2. Step 2: Convert to fraction form
    2,700.11/3,721.90 = 1,989.69/x
  3. Step 3: Cross multiply
    2,700.11x = 3,721.90 × 1,989.69
  4. Step 4: Simplify right side
    2,700.11x = 7,405,422.24
  5. Step 5: Solve for x
    x = 7,405,422.24/2,700.11
  6. Step 6: Final answer
    x = 2,742.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.